. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 2. Arabis lyrata L. Lyre-leaved Rock-cress. Fig. 2070. Arabis lyrata L. Sp. PI. 665. 17S3. Cardamine spathulata Michx. Fl. Bor, Am. 2: 29. 1803. Arabis lyrata occidentalis S. Wats.; Robinson in Gray & Wats. Syn. Fl. i: Part i, 159. 1895. Tufted, perennial or biennial, erect, 4-12' high, gla- brous above, pubescent below, or sometimes glabrous throughout. Ba
. An illustrated flora of the northern United States, Canada and the British possessions, from Newfoundland to the parallel of the southern boundary of Virginia, and from the Atlantic Ocean westward to the 102d meridian. Botany; Botany. 2. Arabis lyrata L. Lyre-leaved Rock-cress. Fig. 2070. Arabis lyrata L. Sp. PI. 665. 17S3. Cardamine spathulata Michx. Fl. Bor, Am. 2: 29. 1803. Arabis lyrata occidentalis S. Wats.; Robinson in Gray & Wats. Syn. Fl. i: Part i, 159. 1895. Tufted, perennial or biennial, erect, 4-12' high, gla- brous above, pubescent below, or sometimes glabrous throughout. Basal leaves lyrate-pinnatifid, l'-2' long, spatulate or oblanceolate, pubescent or glabrous; stem- leaves entire or dentate, spatulate or linear, i'-i' long; pedicels slender, ascending, 3"-4" long in flower, elongating in fruit; flowers pure white, 3"-4" broad; petals much exceeding the calyx; pods 9"-is" long, linear, ascending, less than l" broad, their valves firm, nerved; style i" long or less; seeds in I row, oblong, i" long, wingless. Rocky and sandy places, Ontario to Connecticut, Vir- ginia and Tennessee, west to Manitoba, Alaska, British Co- lumbia and Missouri. Ascends to 2500 ft. in Virginia. Also in Japan. April-Sept. 3. Arabis arenicola (Richards.) Gelert. Arctic Rock-cress. Fig. 2071. Entrema arenicola Richards.; Hook. Fl. Bor. Am. i: 67. 1833. Sisymbrium humifusum J. Vahl, Fl. Dan. pi. 2297- 1840. A. humifusa S. Wats. Proc. Am. Acad. 25: 124. i8go. A. arenicola Gelert, Bot. Tidskr. 21: 270. 1898. Perennial from a slender root, somewhat pubes- cent at least below, or entirely glabrous, the stems diffuse or ascending, slender, mostly simple, 3'-6' long. Leaves spatulate or oblong, nearly entire, 4"-8" long, i"-2" wide, the lower petioled, the upper sessile; flowers purplish or white, about 3" broad; style very short; pods linear, flat, at length drooping, 8"-i2" long, rather more than i
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Keywords: ., bookcentury1900, bookdecade1910, booksubjectbotany, bookyear1913
